A new Iowa poll says first-timers are support presidential candidates Donald Trump and Bernie Sanders.

Donald Trump jumps to a 31% lead among first-time Iowa likely Republican Caucus participants, according to a Quinnipiac University poll released today. Sen. Ted Cruz has 24% support and Sen. Marco Rubio is at 17% support. Dr. Ben Carson is at 8% support and no other candidate is above 4% support.

3% are undecided and 28% of those who name a candidate say they still might change their mind.

On the Democratic side, Sen. Bernie Sanders is relying on first-timers as the new poll says 49% of first-time Iowa likely Democratic Caucus participants back the presidential candidate. Former Secretary of State Hillary Clinton is right behind with 46% support and former Gov. Martin O'Malley has 3% support.

Only 2% remain undecided and 14% of those who name a candidate say they still might change their mind.

Quinnipiac University surveyed 890 Iowa likely Republican Caucus participants between January 25-31 with a margin of error of +/- 3.3 percentage points. 919 Iowa likely Democratic Caucus participants were also surveyed between January 25-31 with a margin of error of +/- 3.2 percentage points.